RBS6_MESCR
ID RBS6_MESCR Reviewed; 186 AA.
AC Q08186;
DT 01-OCT-1994, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-1994, sequence version 1.
DT 25-MAY-2022, entry version 90.
DE RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic 6 {ECO:0000255|HAMAP-Rule:MF_00860};
DE Short=RuBisCO small subunit 6 {ECO:0000255|HAMAP-Rule:MF_00860};
DE Flags: Precursor;
GN Name=RBCS6 {ECO:0000255|HAMAP-Rule:MF_00860};
GN Synonyms=RBCS-6 {ECO:0000303|PubMed:8316216};
OS Mesembryanthemum crystallinum (Common ice plant) (Cryophytum crystallinum).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC Caryophyllales; Aizoaceae; Mesembryanthemum;
OC Mesembryanthemum subgen. Cryophytum.
OX NCBI_TaxID=3544;
RN [1]
RP NUCLEOTIDE SEQUENCE, AND INDUCTION.
RX PubMed=8316216; DOI=10.1007/bf00276944;
RA Derocher E.J., Quigley F., Mache R., Bohnert H.J.;
RT "The six genes of the Rubisco small subunit multigene family from
RT Mesembryanthemum crystallinum, a facultative CAM plant.";
RL Mol. Gen. Genet. 239:450-462(1993).
CC -!- FUNCTION: RuBisCO catalyzes two reactions: the carboxylation of D-
CC ribulose 1,5-bisphosphate, the primary event in carbon dioxide
CC fixation, as well as the oxidative fragmentation of the pentose
CC substrate. Both reactions occur simultaneously and in competition at
CC the same active site. Although the small subunit is not catalytic it is
CC essential for maximal activity. {ECO:0000255|HAMAP-Rule:MF_00860}.
CC -!- SUBUNIT: Heterohexadecamer of 8 large and 8 small subunits.
CC {ECO:0000255|HAMAP-Rule:MF_00860}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast {ECO:0000255|HAMAP-
CC Rule:MF_00860}.
CC -!- INDUCTION: No expression of this mRNA was seen in leaves.
CC {ECO:0000269|PubMed:8316216}.
CC -!- MISCELLANEOUS: The basic functional RuBisCO is composed of a large
CC chain homodimer in a 'head-to-tail' conformation. In form I RuBisCO
CC this homodimer is arranged in a barrel-like tetramer with the small
CC subunits forming a tetrameric 'cap' on each end of the 'barrel'.
CC {ECO:0000255|HAMAP-Rule:MF_00860}.
CC -!- SIMILARITY: Belongs to the RuBisCO small chain family.
CC {ECO:0000255|HAMAP-Rule:MF_00860}.
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DR EMBL; L10213; AAA03698.1; -; Unassigned_DNA.
DR PIR; S35242; S35242.
DR AlphaFoldDB; Q08186; -.
DR SMR; Q08186; -.
DR GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR GO; GO:0009853; P:photorespiration; IEA:UniProtKB-KW.
DR GO; GO:0019253; P:reductive pentose-phosphate cycle; IEA:UniProtKB-KW.
DR CDD; cd03527; RuBisCO_small; 1.
DR Gene3D; 3.30.190.10; -; 1.
DR HAMAP; MF_00859; RuBisCO_S_bact; 1.
DR InterPro; IPR024681; RuBisCO_ssu.
DR InterPro; IPR000894; RuBisCO_ssu_dom.
DR InterPro; IPR024680; RuBisCO_ssu_N.
DR InterPro; IPR036385; RuBisCO_ssu_sf.
DR PANTHER; PTHR31262; PTHR31262; 1.
DR Pfam; PF12338; RbcS; 1.
DR Pfam; PF00101; RuBisCO_small; 1.
DR PRINTS; PR00152; RUBISCOSMALL.
DR SMART; SM00961; RuBisCO_small; 1.
DR SUPFAM; SSF55239; SSF55239; 1.
PE 2: Evidence at transcript level;
KW Calvin cycle; Carbon dioxide fixation; Chloroplast; Photorespiration;
KW Photosynthesis; Plastid; Transit peptide.
FT TRANSIT 1..60
FT /note="Chloroplast"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT CHAIN 61..186
FT /note="Ribulose bisphosphate carboxylase small subunit,
FT chloroplastic 6"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT /id="PRO_0000031532"
SQ SEQUENCE 186 AA; 20494 MW; 5825DFF86F86B7F8 CRC64;
MASSMLSNAA VATTAASRSA GAQASMVAPF TGLKSVSAFP VTRKSSNDLS TVPSNGGKVQ
CMQVWPPLGK KKFETLSYLP PLSEESLLKE VQYLLNNGWV PCLEFEPTHG FVYREHGNTP
GYYDGRYWTM WKLPMFGCTD PSQVVAELEE AKKAYPEAFI RIIGFDNVRQ VQCVSFIAYK
PASYDA
